The Centre pour la Communication Scientifique Directe (CCSD) is a French organization of the Centre National de la Recherche Scientifique (CNRS) devoted to the development of the open access repositories HAL, TEL and MediHal, the web platform Episciences [fr] and the web platform Sciencesconf.

The CCSD (translated by Centre for Direct Scientific Communication) was founded in 2000 by CNRS.

Its main activity is focused on the development and exploitation of the open archive for scholarly publications HAL, and for thesis and dissertations TEL.

HAL is a common archive that is available in several environments: institutional (Hal-INRIA or Hal-INSERM), thematic (Hal-SHS for the humanities and social sciences, for example), and typological (theses, images).

The CCSD is involved in the Bibliothèque Scientifique Numérique (BSN or Digital Science Library), especially in the working group BSN4 (open archives).